Audio mixer



FIG. 1 is a front perspective view of the front, top and right side of an audio mixer showing my new design;

FIG. 2 is a rear perspective view of the rear, bottom and left side thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom view thereof.

Broken lines are used to show portions of the audio mixer that are not being claimed, and thus form no part of the claimed invention. 

CLAIM The ornamental design for an audio mixer, as shown and described. 